Urgently looking for help – BC failure

Hello, have already found 2 posts on my problem, but none was with final solution. Had a few months ago the following problem: display SRS airbag defective, urgent maintenance, then power steering defective, then flashed the whole display with all the displays on and then everything was dark, air conditioning didn’t work anymore, only the radio was still running. In the workshop n software update was made, for which I also had to cover 55 euros, although still in the used car warranty bi n (V50 2.0 D with first registration 04/04, I bought it in January). And now it started again with the display failure. Be in the workshop again today, but would like to know if one of you has found a solution? Should I insist that the control unit is changed? Thank you in advance, Greeting Carmen